CN101330746B - Method and system for implementing call deflection of IMS central control business - Google Patents
Method and system for implementing call deflection of IMS central control business Download PDFInfo
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- CN101330746B CN101330746B CN2007101304201A CN200710130420A CN101330746B CN 101330746 B CN101330746 B CN 101330746B CN 2007101304201 A CN2007101304201 A CN 2007101304201A CN 200710130420 A CN200710130420 A CN 200710130420A CN 101330746 B CN101330746 B CN 101330746B
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Abstract
The invention provides a method and a system for carrying out call deflection in the business. The system includes a calling terminal, a called terminal, an IMS CS Domain control function, a Call Session Control Function (CSCF) and a telecommunication application server. The method comprises the following steps: the called terminal passes a deflection request on to the IMS CS Domain control function through the session control path of a PS Domain, and the deflection request at least carries a deflection number. The IMS CS Domain control function receives the deflection request and transmits the request to the telecommunication application server via the CSCF. The telecommunication application server carries out call deflection. When the technical proposal of the invention carries out call deflection, the deflection request is passed on to the IMS CS Domain control function through the session path of the PS Domain, and call deflection is realized by the IMS CS Domain control function in replacement of the terminals, thereby realizing the call deflection of ICS in the IMS Domain.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method and system that carries out Call Deflexion in a kind of IMS centralized control business.
Background technology
IP (network interconnection agreement, Internet Protocol, be called for short IP) IP multimedia subsystem, IMS (IPMultimedia Core Network Subsystem, be called for short IMS) be by third generation partner program (3rdGeneration Partnership Project, abbreviation 3GPP) a kind of IP-based network framework that proposes, it has made up an opening and service environment flexibly, supports multimedia application, and provides abundant multimedia service for the user.
IMS is based on the communication network framework of IP, irrelevant with access technology, except being GPRS (General Packet Radio Service, GPRS), WLAN (Wireless LocalArea Network, WLAN (wireless local area network)) etc. packet access network provides outside the business, can also be GSM (Global System for Mobile communications, global system for mobile communications), UMTS mobile cellular networks such as (Universal Mobile Telecommunications System, unified mobile communcations systems) provides professional.
Mobile cellular network such as GSM, UMTS adopts circuit-switched technology, is called circuit (CircuitSwitched is called for short CS) territory, can provide basic speech business for the user, and based on the supplementary service of speech business.When IMS was inserted in the CS territory, it developed into a kind of access way, and business provides by IMS is unified fully, and this technology is called IMS centralized traffic (IMS Centralized Service is called for short ICS).
The IMS centralized traffic has the following advantages:
(1) IMS provides consistent business for access waies such as circuit domain, packet domain, and network enabled merges;
(2) support the CS network to the evolution of IMS network;
(3) not only support to have ICS ability subscriber equipment, also support the existing subscriber equipment that does not possess the ICS ability.
Fig. 1 is the Organization Chart of IMS centralized control business, comprises following network element:
User terminal 101 is called for short UE (User Equipment);
Visited Mobile Switching Center 102 is called for short VMSC (Visited Mobile Switch Center);
Home subscriber server 103 is called for short HSS (Home Subscriber Server);
MGCF 104 is called for short MGCF (Media Gateway ControlFunction);
Media gateway 105 is called for short MGW (Media Gateway);
IMS circuit domain control function 106 is called for short ICCF (IMS CS Control Function);
CSCF 107 is called for short CSCF (Call Session Control Function);
Telecommunication application server 108 is called for short TAS (Telecom Application Server).
UE 101 sets up 3 paths through the ICCF 106 in VMSC 102 to IMS territories: session control path, carrying control path and bearer path, wherein:
The session control path is carried on PS (Packet Switched, the packet switching) territory, uses the SIP signaling, and this path arrives ICCF106 by CSCF107.
Carrying control path UE 101 adopts the CS control signaling of standard to insert VMSC 102, and is linked into IMS by MGCF 104, arrives ICCF 106 by CSCF107.
Bearer path is by being that UE 101 is linked into IMS by VMSC 102 and MGW 105, and sets up medium with the remote user equipment of this session and be connected.
The IMS centralized traffic is utilized the interactive sessions control information between UE 101 and ICCF 106 of session control path, and sets up and the control media bearer by carrying control path, and ICCF 106 serves as the IMS user agent, replaces subscriber equipment to insert IMS.
In addition, can adopt TAS 108 to realize all kinds of telecommunication services, HSS103 is used to obtain roaming number and leading subscriber data.
The Call Deflexion business is to call out the called number B of the deflection business of having contracted as calling subscriber A, after the B ring, personal inclination according to user B, import a deflection number C, initiate a deflection business, user B tells switch with deflection information, initiates the calling to deflection number C by switch, thereby makes user A and deflection user C conversation.
Fig. 2 is the user that the IMS customer call inserts from CS, realizes the flow chart of Call Deflexion from the user of CS access.Idiographic flow is as follows
201, CSCF receives the called SIP conversation request message that Calling Side calling subscriber A initiates to called subscriber B;
202, CSCF is established to the calling of called subscriber B, the B ring according to user B number;
203, after the user terminal B ring, input deflection number C gives VMSC with deflection information again by the release message transmission;
204, VMSC finds that according to receiving release message the user has the deflection business, then carries out the Call Deflexion business;
205, VMSC initiates a calling to deflection user C, and calling subscriber A and deflection user C are conversed.
It seems that from above flow process the Call Deflexion business is the business that realizes in the CS territory,, the Call Deflexion business to realize, obviously it seems and to realize from top flow process in the IMS territory for the ICS business.
Summary of the invention
The technical problem to be solved in the present invention provides the method and system that carries out Call Deflexion in a kind of IP Multimedia System centralized control business, makes ICS user realize the business of Call Deflexion in the IMS territory.
In order to solve the problems of the technologies described above, the invention provides the method for carrying out Call Deflexion in a kind of IP Multimedia System centralized control business, comprising:
A, terminal called pass to IP Multimedia System circuit domain control function ICCF with the session control path of deflection request by packet-switched domain; At least carry the deflection number in the described deflection request;
B, ICCF receive described deflection request, and it is transmitted to telecommunication application server TAS by CSCF CSCF; TAS carries out Call Deflexion.
Further, in the steps A: the sip message that temporarily shifts out is called out in described deflection request for expression.
Further, in the steps A: described deflection request is SIP 302 response messages.
Further, described step B specifically comprises:
After B1, ICCF obtain described deflection request, transmit sip message to TAS as the deflection request by CSCF;
B2, TAS carry out Call Deflexion, before calling out, changes the notice calling terminal, and to the foundation that makes a call of deflection number.
Further, described step B2 specifically comprises:
Before just calling out, changes B2a, TAS notice CSCF;
Before just calling out, changes B2b, CSCF notice calling terminal;
B2c, TAS to CSCF to the foundation that makes a call of deflection number;
B2d, CSCF transmit the call setup that the deflection number is initiated.
Further, among the described step B2a, TAS changes before just calling out with SIP 181 message informing CSCF; Among the described step B2b, CSCF changes before just calling out with SIP 181 message informing calling terminals;
Further, described method also comprises the step C parallel with step B: discharge bearing resource and the session of terminal called to ICCF.
Further, among the described step C, discharge terminal called to the mode of the bearing resource of ICCF and session for comprising following two kinds:
A, after ICCF receives the deflection request, initiate to discharge conversation message by ICCF, arrive terminal called by CSCF, MGCF and VMSC, thereby discharge bearing resource and the session of terminal called to ICCF;
B, when terminal called after ICCF transmits the deflection request, through initiating releasing bearing resource message by terminal called after one section time-delay, arrive ICCF, thereby discharge bearing resource and the session of terminal called to ICCF by VMSC, MGCF and CSCF.
Further, also comprise before the described steps A:
After CSCF is receiving the call request that calling terminal sends over, by TAS, ICCF, MGCF and VMSC to the terminal called foundation that makes a call, dialed terminal bell; The called subscriber imports the deflection number according to the personal inclination to terminal called.
The present invention also provides the system that carries out Call Deflexion in a kind of IP Multimedia System centralized control business, comprising: calling terminal, terminal called, ICCF, CSCF and TAS; It is characterized in that:
Described CSCF is used to receive the call request of calling terminal, and to the terminal called foundation that makes a call; Also being used to receive changes before the notice calling terminal is just called out after SIP 181 message of TAS; And receive TAS to the deflection number make a call set up after, transmit the call setup that the terminal that deflects into is initiated.
Described terminal called is used for after ring, initiates the deflection request according to the deflection number of user input, and the session control path of deflection request by packet-switched domain passed to ICCF; At least carry the deflection number in the described deflection request;
Described ICCF is used to receive the deflection request that terminal called transmits, and it is transmitted to TAS by CSCF;
Described TAS is used to receive the deflection request that ICCF transmits, and after reception, change before just calling out with SIP 181 message informing CSCF, and to CSCF to the foundation that makes a call of deflection number.
Further, described terminal called passes to the deflection request of ICCF for representing to call out the sip message that temporarily shifts out.
Further, to pass to the deflection request of ICCF be SIP 302 response messages to described terminal called.
Because technical scheme of the present invention is when carrying out Call Deflexion, do not adopt original CS field technique to carry the method for deflection information in the message of CS, but the deflection request is passed to ICCF by the session path in PS territory, replace UE to realize the Call Deflexion business by ICCF, thereby realized that ICS Call Deflexion business controls in the IMS territory.
Description of drawings
Fig. 1 is the group-network construction schematic diagram of IP Multimedia System IMS centralized control business;
Fig. 2 is the existing flow chart of realizing the Call Deflexion business in the CS territory;
Fig. 3 is the concrete implementing procedure figure that carries out the method for Call Deflexion among the ICS of the present invention;
Fig. 4 is the flow chart of application example one that carries out the method for Call Deflexion among the ICS of the present invention;
Fig. 5 is the flow chart of application example two that carries out the method for Call Deflexion among the ICS of the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
The invention provides in a kind of IP Multimedia System centralized control business, ICS user realizes the method for Call Deflexion business, the session control path that its core concept is a deflection business that UE is carried out by the PS territory is carried to ICCF with the Call Deflexion request, replaces UE to the deflection that makes a call of IMS territory by ICCF.This method may further comprise the steps as shown in Figure 3:
(1) after CSCF is receiving the call request that calling terminal sends over, by TAS, ICCF, MGCF and VMSC to the terminal called foundation that makes a call, dialed terminal bell;
(2) called subscriber according to the personal inclination to terminal called input deflection number---the number of the terminal that promptly will deflect into, the deflection service request makes a call; Terminal called passes to ICCF by the session path in PS territory with the deflection request; At least carry the deflection number in the described deflection request; Described deflection request is called out the sip message temporarily shift out for expression, can but be not limited to SIP 302 response messages.
(3) ICCF handles described deflection request, will be transmitted to TAS by CSCF as the sip message of deflection request; TAS carries out Call Deflexion.
The present invention transmits deflection information to VMSC, but the Call Deflexion business information is delivered to the IMS territory by the session control path, PS territory in the ICS called service when carrying out the deflection business, by the TAS execution deflection business in IMS territory.
In above-mentioned Call Deflexion method, step (3) can specifically comprise:
(31) after ICCF obtains described deflection request, replace terminal called to initiate deflection, at first transmit sip message as the deflection request, expression Call Deflexion to TAS by CSCF;
(32) TAS carries out Call Deflexion, and the notice Calling Side changes before calling out, and to the foundation that makes a call of deflection number.
Step (32) can specifically be refined as following steps:
(32a) TAS changes before just calling out with SIP 181 message informing CSCF;
(32b) CSCF changes before just calling out with SIP 181 message informing calling terminals;
(32c) TAS to CSCF to the foundation that makes a call of deflection number;
(32d) CSCF transmits the call setup to the deflection number.
Promptly realized Call Deflexion behind the call setup.
The method of carrying out Call Deflexion among the described ICS can also comprise the step (4) parallel with step (3): discharge bearing resource and the session of terminal called to ICCF; Also can be said to is to discharge bearing resource and the session of ICCF to terminal called.
Discharge terminal called in the described step (4) and comprise following two kinds at least to the bearing resource of ICCF and the mode of session:
(1) after ICCF receives the deflection request, initiate to discharge conversation message by ICCF, arrive terminal called by CSCF, MGCF, VMSC, thereby discharge bearing resource and the session of terminal called to ICCF; Specific practice is: ICCF to the cancellation message that MGCF sends SIP, goes to discharge the session of ICCF to MGCF by CSCF; MGCF cancels the release message that message changes ISUP (ISUP) into SIP and passes to VMSC, discharges the bearing resource of MGCF to VMSC; VMSC sends out release message to terminal called, discharges the bearing resource of VMSC to terminal called.
(2) when terminal called after ICCF transmits the deflection request, through initiating releasing bearing resource message by terminal called after one section time-delay, arrives ICCF, thereby the release terminal called is to bearing resource and the session of ICCF by VMSC, MGCF, CSCF; Specific practice is: terminal called through sending out release message to VMSC after one section time-delay, discharges the bearing resource of terminal called to VMSC after sending out the Call Deflexion request to ICCF; VMSC sends out the ISUP release message to called MGCF, discharges the bearing resource of VMSC to MGCF; MGCF to the cancellation message that ICCF sends out SIP, discharges the session of MGCF to ICCF by CSCF.
The present invention also provides in a kind of IP Multimedia System centralized control business, and ICS user carries out the system of Call Deflexion, comprises calling terminal, terminal called, VMSC, MGCF, ICCF, CSCF and TAS.
Described CSCF is used to receive the call request of calling terminal, and by TAS, ICCF, MGCF and VMSC to the terminal called foundation that makes a call; Also being used to receive changes before the notice calling terminal is just called out after SIP 181 message of TAS; And receive TAS to the deflection number make a call set up after, transmit call setup to the deflection terminal.
Described terminal called is used for after ring, initiates the deflection request according to the deflection number of user input, and the session control path of deflection request by the PS territory passed to ICCF, carries the deflection number at least in the described deflection request; Described deflection request is called out the sip message temporarily shift out for expression, can but be not limited to SIP 302 response messages.
Described ICCF is used to receive the deflection request that terminal called transmits, and it is transmitted to TAS by CSCF.
Described TAS is used to receive the deflection request that ICCF transmits, and commentaries on classics before just calling out with SIP 181 message informing CSCF after reception, and to CSCF to the foundation that makes a call of deflection number.
Further be illustrated with two application examples of the present invention below.
Fig. 4 and Fig. 5 realize the flow chart of two application examples of Call Deflexion business for ICS user of the present invention.Set up an ICS called service when a calling terminal A calls out called ICS terminal B, after the ICS terminal B ring, initiate a deflection business according to user's demand, the deflection number is C.
Two application examples provide two kinds of different release terminal called B solution to ICCF bearing resource and session, and this is in order to solve when called user terminal B is carrying out the deflection business operation.If the release message of called user terminal arrives first ICCF than the deflection message that USSD carries, whole calling will be moved to end, and can not carry out the problem of deflection business.
Discharging ICCF in the application example one is after ICCF receives the deflection service request to the bearing resource of terminal called B and the mode of session, is initiated to discharge flow process by ICCF, and concrete steps comprise as shown in Figure 4:
401, CSCF receives the called SIP conversation request message that Calling Side calling terminal A initiates to terminal called B;
402, CSCF is established to the calling of terminal called B according to terminal called B number, terminal called B ring;
403, the terminal called B deflection that makes a call is carried Call Deflexion request SIP 302 response messages (expression is called out and temporarily shifted out) by the session control path in PS territory, this Call Deflexion request through CSCF to ICCF.
Step 404 to 406 is for discharging the flow process of terminal called B to ICCF bearing resource and session, and step 407,408 is the call flow to the deflection number, and these two flow processs walk abreast, and all is to begin to carry out after step 403.
404, ICCF handles the Call Deflexion request of receiving, by the cancellation message of CSCF to MGCF transmission SIP, goes to discharge the session of ICCF to MGCF immediately; Execution in step 405;
405, MGCF cancels the release message that message changes ISUP into SIP and passes to VMSC, discharges the bearing resource of MGCF to VMSC; Execution in step 406;
406, VMSC sends out release message to terminal called B, discharges the bearing resource of VMSC to terminal called B.So far, release terminal called B finishes to the flow process of ICCF bearing resource and session.
407, ICCF handles in the Call Deflexion request of receiving in step 404, and ICCF also transmits SIP 302 message by CSCF to TAS, and expression is called out and temporarily shifted out; Execution in step 408;
408, TAS carries out the Call Deflexion business.So far, the call flow to the deflection number finishes.
Step 408 specifically is refined as step 409 to 412:
409, TAS changes before just calling out with SIP 181 message informing CSCF;
410, CSCF changes before just calling out with SIP 181 message informing calling terminal A;
411, TAS to CSCF to the deflection number C foundation that makes a call;
412, CSCF transmits the call setup that deflection number C is initiated.
Discharging ICCF in the application example two is that terminal called B sends the deflection business information behind ICCF to the bearing resource of terminal called B and the mode of session, discharge bearing resource and the session of ICCF through one section time-delay by terminal called B to terminal called B, concrete steps comprise as shown in Figure 5:
501, CSCF receives the called SIP conversation request message that Calling Side calling terminal A initiates to terminal called B;
502, CSCF is established to the calling of terminal called B according to terminal called B number, terminal called B ring;
503, the terminal called B deflection that makes a call is carried Call Deflexion request SIP 302 response messages (expression is called out and temporarily shifted out) by the session control path in PS territory, this Call Deflexion request through CSCF to ICCF.
504, ICCF handles in the Call Deflexion request of receiving in step 404, and ICCF also transmits SIP 302 message by CSCF to TAS, and expression is called out and temporarily shifted out; Execution in step 408;
505, TAS carries out the Call Deflexion business.So far, the call flow to the deflection number finishes.
Step 505 specifically is refined as step 506 to 509:
506, TAS changes before just calling out with SIP 181 message informing CSCF;
507, CSCF changes before just calling out with SIP 181 message informing calling terminal A;
508, TAS to CSCF to the deflection number C foundation that makes a call;
509, CSCF transmits the call setup that deflection number C is initiated.
510, after ICCF sends out the Call Deflexion request, send out release message to VMSC in step 503 through one section time-delay terminal called B, discharge the bearing resource of terminal called B to VMSC;
511, VMSC sends out the ISUP release message to called MGCF, discharges the bearing resource of VMSC to MGCF;
512, MGCF to the cancellation message that ICCF sends out SIP, discharges the session of MGCF to ICCF by CSCF; So far, terminal called B finishes to ICCF bearing resource and session release.
The flow process of step 504 to 505 and the flow process of step 510 to 512 are parallel.
As can be seen, take method of the present invention in the flow process of above-mentioned two application examples, use the session control path in PS territory to transmit Call Deflexion information, realized ICS UE Call Deflexion business.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (12)
1. carry out the method for Call Deflexion in the IP Multimedia System centralized control business, comprising:
A, terminal called pass to IP Multimedia System circuit domain control function ICCF with the session control path of deflection request by packet-switched domain; At least carry the deflection number in the described deflection request;
B, ICCF receive described deflection request, and it is transmitted to telecommunication application server TAS by CSCF CSCF; TAS carries out Call Deflexion.
2. the method for claim 1 is characterized in that, in the steps A: the sip message that temporarily shifts out is called out in described deflection request for expression.
3. the method for claim 1 is characterized in that, in the steps A: described deflection request is SIP 302 response messages.
4. method as claimed in claim 2 is characterized in that, described step B specifically comprises:
After B1, ICCF obtain described deflection request, transmit sip message to TAS as the deflection request by CSCF;
B2, TAS carry out Call Deflexion, before calling out, changes the notice calling terminal, and to the foundation that makes a call of deflection number.
5. method as claimed in claim 4 is characterized in that, described step B2 specifically comprises:
Before just calling out, changes B2a, TAS notice CSCF;
Before just calling out, changes B2b, CSCF notice calling terminal;
B2c, TAS to CSCF to the foundation that makes a call of deflection number;
B2d, CSCF transmit the call setup that the deflection number is initiated.
6. method as claimed in claim 5 is characterized in that:
Among the described step B2a, TAS changes before just calling out with SIP 181 message informing CSCF;
Among the described step B2b, CSCF changes before just calling out with SIP 181 message informing calling terminals.
7. the method for claim 1 is characterized in that, also comprises the step C parallel with step B: discharge bearing resource and the session of terminal called to ICCF.
8. method as claimed in claim 7 is characterized in that, among the described step C, discharge terminal called to the mode of the bearing resource of ICCF and session for comprising following two kinds:
A, after ICCF receives the deflection request, initiate to discharge conversation message by ICCF, arrive terminal called by CSCF, MGCF MGCF and Visited Mobile Switching Center VMSC, thereby discharge bearing resource and the session of terminal called to ICCF;
B, when terminal called after ICCF transmits the deflection request, through initiating releasing bearing resource message by terminal called after one section time-delay, arrive ICCF, thereby discharge bearing resource and the session of terminal called to ICCF by VMSC, MGCF and CSCF.
9. the method for claim 1 is characterized in that, also comprises before the described steps A:
After CSCF is receiving the call request that calling terminal sends over, by TAS, ICCF, MGCF and VMSC to the terminal called foundation that makes a call, dialed terminal bell; The called subscriber imports the deflection number according to the personal inclination to terminal called.
10. carry out the system of Call Deflexion in the IP Multimedia System centralized control business, comprising: calling terminal, terminal called, IMS circuit domain control function ICCF, CSCF CSCF and telecommunication application server TAS; It is characterized in that:
Described CSCF is used to receive the call request of calling terminal, and to the terminal called foundation that makes a call; Also being used to receive changes before the notice calling terminal is just called out after SIP 181 message of TAS; And receive TAS to the deflection number make a call set up after, transmit the call setup that the terminal that deflects into is initiated;
Described terminal called is used for after ring, initiates the deflection request according to the deflection number of user input, and the session control path of deflection request by packet-switched domain passed to ICCF; At least carry the deflection number in the described deflection request;
Described ICCF is used to receive the deflection request that terminal called transmits, and it is transmitted to TAS by CSCF;
Described TAS is used to receive the deflection request that ICCF transmits, and after reception, change before just calling out with SIP 181 message informing CSCF, and to CSCF to the foundation that makes a call of deflection number.
11. system as claimed in claim 10 is characterized in that: described terminal called passes to the deflection request of ICCF and calls out the sip message that temporarily shifts out for expression.
12. system as claimed in claim 10 is characterized in that: the deflection request that described terminal called passes to ICCF is SIP 302 response messages.
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| CN2007101304201A CN101330746B (en) | 2007-07-18 | 2007-07-18 | Method and system for implementing call deflection of IMS central control business |
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| CN2007101304201A CN101330746B (en) | 2007-07-18 | 2007-07-18 | Method and system for implementing call deflection of IMS central control business |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625193A (en) * | 2003-12-04 | 2005-06-08 | 华为技术有限公司 | Method of realizing switching calling current of mobile terminal and its radio communication system |
| CN1859426A (en) * | 2006-03-20 | 2006-11-08 | 华为技术有限公司 | Method for connecting multimedia subsystem of circuit field terminal and its realizing device |
| CN1925525A (en) * | 2005-09-01 | 2007-03-07 | 华为技术有限公司 | Method for realizing bridged collection of IP multimedia subsystem |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625193A (en) * | 2003-12-04 | 2005-06-08 | 华为技术有限公司 | Method of realizing switching calling current of mobile terminal and its radio communication system |
| CN1925525A (en) * | 2005-09-01 | 2007-03-07 | 华为技术有限公司 | Method for realizing bridged collection of IP multimedia subsystem |
| CN1859426A (en) * | 2006-03-20 | 2006-11-08 | 华为技术有限公司 | Method for connecting multimedia subsystem of circuit field terminal and its realizing device |
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